Question: A massless spring in a spring gun has a spring constant of k = 2 5 Nm . When the gun is aimed horizontally, a

A massless spring in a spring gun has a spring constant of k=25Nm. When the gun is aimed horizontally, a projectile of mass 40g is shot at a speed of 5ms as the spring expands. What was the initial compression of the spring (in cm)?

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